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A 71.0 kg skier is pulled up a frictionless ski slope that makes an angle of 15.0 deg. with respect to the horizontal by holding onto a tow rope parallel to the slope. Determine the magnitude of the force exerted by the rope on the skier if the skier is moving with a constant speed of 2.0 m/s?
A hoop and a disk, both of 0.48- m radius and 3.0- kg mass, are released from the top of an inclined plane 3.3 m high and 8.3 m long. What is the speed of the hoop
the cycle for a heat engine that uses a gas having ? =1.25. The initial temperature is T1=300K, What is the power output of the engine
A coil of wire with 110 turns is wrapped in a circular shape with a radius of 29 cm. The plane of the coil is perpendicular to a magnetic field of magnitude 2.0 T. What is the cross sectional area of the coil
The mass of mars is 6.419 times 10 26 square kg and the mass of a single proton is 1.673 times 10 negative 27 square kg. assuming mars is made entirely of protons, how various protons would make up mars.
A spring-loaded gun fires a 0.080-kg puck along a tabletop. If instead it only rises to a height of 5.00 m because of friction, what is the change in mechanical energy
Tritium (3H) decays by negative beta decay with a half-life of 12.16 years. Use an atomic weight. What is the mass in g of 1 mCi of tritium? 3.026 For 3H.To what nucleus does 3H decay.
A car drives north at 42 mi/h for 10 {rm min} and then turns east and goes 5.0 {rm mi} at 62 mi/h. at last, it goes southwest at 30 mi/h for 6.0 {rm min}.
To verify her suspicion that a rock specimen is hollow, a geologist weighs the specimen in air and in water. What fraction of the specimen's apparent volume is solid
A proton in the upper atmosphere moves at 8.6×105m/s , perpendicular to Earth's magnetic field, Find the curvature radius of the proton's trajectory
A string under a tension of 49.0 N is used to whirl a rock in a horizontal circle of radius 2.40 m at a speed of 20.8 m/s on a frictionless surface, What is the breaking strength, in newtons, of the string
Light from a monochromatic source shines through a double slit onto a screen 5.0 m away, What is the wavelength of the incident light
You have a mass of 87 kg and are on a 50-degree slope hanging on to a cord with a breaking strength of 221 newtons. Illustrate what must be the coefficient of static friction to 2 decimal places between you and the surface for you to be saved fro..
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